<template>
  <el-dialog
    width="500px"
    title="员工导入"
    :visible="showExcelDialog"
    @close="$emit('update:showExcelDialog', false)"
  >
    <el-row type="flex" justify="center">
      <div class="upload-excel">
        <input
          ref="excel-upload-input"
          class="excel-upload-input"
          type="file"
          accept=".xlsx, .xls"
          @change="uploadChange"
        >
        <div class="drop">
          <i class="el-icon-upload" />
          <el-button type="text" @click="getTemplate">下载导入模板</el-button>
          <span>将文件拖到此处或
            <el-button type="text" @click="uploadExcel">点击上传</el-button>
          </span>
        </div>
      </div>
    </el-row>
    <el-row type="flex" justify="end">
      <!-- update:props属性名，值 直接修改 .sync修饰符的属性值 -->
      <el-button
        size="mini"
        type="primary"
        @click="$emit('update:showExcelDialog', false)"
      >取消</el-button>
    </el-row>
  </el-dialog>
</template>
<script>
import { getExportTemplate, uploadExcel } from '@/api/employee'
import FileSaver from 'file-saver'

export default {
  props: {
    showExcelDialog: {
      type: Boolean,
      default: false
    }
  },
  methods: {
    async uploadChange(e) {
      try {
        const files = e.target.files
        if (files.length) {
          const file = files[0]
          const fd = new FormData()
          fd.append('file', file)
          console.log(file)
          // const sliceBlob = file.slice(0, 1024, file.type)
          // console.log(sliceBlob)
          // const chunk = 10 * 1024
          // const totalCHUNKS = Math.ceil(file.size / chunk)
          // for (let index = 0; index < totalCHUNKS; index++) {
          //   const start = index * chunk
          //   const end = Math.min(start + chunk, file.size)
          //   const sliceBlob = file.slice(start, end, file.type)
          //   console.log(sliceBlob)
          //   const fd = new FormData()
          //   fd.append('file', sliceBlob)
          //   const res = await uploadExcel(fd)
          //   console.log(res)
          // }

          await uploadExcel(fd)
          this.$emit('update:showExcelDialog', false)
          this.$emit('uploadSuccess')
        }
      } catch (e) {
        console.log(e)
      } finally {
        this.$refs['excel-upload-input'].value = ''
      }
    },
    uploadExcel() {
      this.$refs['excel-upload-input'].click()
    },
    async getTemplate() {
      const res = await getExportTemplate()
      FileSaver.saveAs(res, '员工导入模版.xlsx')
    }
  }
}
</script>

<style scoped lang="scss">
.upload-excel {
  display: flex;
  justify-content: center;
  margin: 20px;
  width: 360px;
  height: 180px;
  align-items: center;
  color: #697086;
  .excel-upload-input {
    display: none;
    z-index: -9999;
  }
  .btn-upload,
  .drop {
    border: 1px dashed #dcdfe6;
    width: 100%;
    height: 100%;
    text-align: center;
    line-height: 160px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  .drop {
    line-height: 40px;
    color: #bbb;
    i {
      font-size: 60px;
      display: block;
      color: #c0c4cc;
    }
  }
}
</style>
